networkd: minor simplification

[elogind.git] / src / network / networkd-manager.c

diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c
index 42b51137ef0c2872b1941a8b2033f91579ac6e6d..ac207851cbb5b46ac5d2414fffefc79a3baec4fc 100644 (file)
--- a/src/network/networkd-manager.c
+++ b/src/network/networkd-manager.c
@@ -35,6 +35,7 @@
 #include "virt.h"
 
 #include "sd-rtnl.h"
+#include "sd-daemon.h"
 
 /* use 8 MB for receive socket kernel queue. */
 #define RCVBUF_SIZE    (8*1024*1024)
@@ -75,9 +76,28 @@ static int setup_default_address_pool(Manager *m) {
         return 0;
 }
 
+static int systemd_netlink_fd(void) {
+        int n, fd, rtnl_fd = -EINVAL;
+
+        n = sd_listen_fds(true);
+        if (n <= 0)
+                return -EINVAL;
+
+        for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
+                if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
+                        if (rtnl_fd >= 0)
+                                return -EINVAL;
+
+                        rtnl_fd = fd;
+                }
+        }
+
+        return rtnl_fd;
+}
+
 int manager_new(Manager **ret) {
         _cleanup_manager_free_ Manager *m = NULL;
-        int r;
+        int r, fd;
 
         m = new0(Manager, 1);
         if (!m)
@@ -96,8 +116,11 @@ int manager_new(Manager **ret) {
         sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
         sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
 
-        r = sd_rtnl_open(&m->rtnl, 3, RTNLGRP_LINK, RTNLGRP_IPV4_IFADDR,
-                         RTNLGRP_IPV6_IFADDR);
+        fd = systemd_netlink_fd();
+        if (fd < 0)
+                r = sd_rtnl_open(&m->rtnl, 3, RTNLGRP_LINK, RTNLGRP_IPV4_IFADDR, RTNLGRP_IPV6_IFADDR);
+        else
+                r = sd_rtnl_new_from_netlink(&m->rtnl, fd);
         if (r < 0)
                 return r;
 
@@ -686,3 +709,5 @@ AddressFamilyBoolean address_family_boolean_from_string(const char *s) {
 
         return _ADDRESS_FAMILY_BOOLEAN_INVALID;
 }
+
+DEFINE_CONFIG_PARSE_ENUM(config_parse_address_family_boolean, address_family_boolean, AddressFamilyBoolean, "Failed to parse option");